List of Groovy versions for Grails

Grails_Groovy_Versions.txt

// Compiled by Igor Shults
// Last Updated: July 23, 2020

GRAILS    GROOVY  SOURCE
4.1.0     2.5.14  https://github.com/grails/grails-core/blob/v4.1.0/gradle.properties
4.0.4     2.5.6   
4.0.3     2.5.6   
4.0.2     2.5.6   
4.0.1     2.5.6   
4.0.0     2.5.6   https://github.com/grails/grails-core/blob/v4.0.0/build.gradle

3.3.11    2.4.17  
3.3.10    2.4.17  https://github.com/grails/grails-core/commit/06a05143ec9039e631a2543b11fb52576157643e#diff-c197962302397baf3a4cc36463dce5ea
3.3.9     2.4.15
3.3.8     2.4.15
3.3.7     2.4.15
3.3.6     2.4.15
3.3.5     2.4.15  https://github.com/grails/grails-core/blob/v3.3.5/build.gradle
3.3.4     2.4.14
3.3.3     2.4.14  https://github.com/grails/grails-core/blob/dd4dfa01cb263637dd32c76146dc9377e28ba45f/build.gradle#L43
3.3.2     2.4.13  https://github.com/grails/grails-core/blob/3.3.x/build.gradle
3.3.1     2.4.11
3.3.0     2.4.11  

3.2.13    2.4.15  https://github.com/grails/grails-core/blob/v3.2.13/build.gradle
3.2.12    2.4.11
3.2.11    2.4.11  https://github.com/grails/grails-core/blob/d85666969f3ef38386115d206f63dda552f94cbd/build.gradle
3.2.10    2.4.10
3.2.9     2.4.10
3.2.8     2.4.10  https://github.com/grails/grails-core/blob/7bc3b8adb23af80c4ca9b875469d20852666184f/build.gradle
3.2.7     2.4.7
3.2.6     2.4.7
3.2.5     2.4.7
3.2.4     2.4.7
3.2.3     2.4.7
3.2.2     2.4.7
3.2.1     2.4.7
3.2.0     2.4.7

3.1.16    2.4.7
3.1.15    2.4.7
3.1.14    2.4.7
3.1.13    2.4.7
3.1.12    2.4.7
3.1.11    2.4.7
3.1.10    2.4.7
3.1.9     2.4.7   https://github.com/grails/grails-core/blob/cad0e807f768aa766ee5d482060692cee22e6bcc/build.gradle
3.1.8     2.4.6
3.1.7     2.4.6
3.1.6     2.4.6
3.1.5     2.4.6
3.1.4     2.4.6
3.1.3     2.4.6
3.1.2     2.4.6   https://github.com/grails/grails-core/blob/695a11caa4025e91bdbf5094c0b6324cf5b22075/build.gradle
3.1.1     2.4.5
3.1.0     2.4.5   https://github.com/grails/grails-core/blob/c309bfe2f4613942cccbd2428f35ca6f0d018419/build.gradle

3.0.17    2.4.5
3.0.16    2.4.5
3.0.15    2.4.5
3.0.14    2.4.5
3.0.13    2.4.5
3.0.12    2.4.5
3.0.11    2.4.5
3.0.10    2.4.5
3.0.9     2.4.5   https://github.com/grails/grails-core/blob/564dcdf6204c74cf64c29ef4de206fdca5635a87/build.gradle
3.0.8     2.4.4 
3.0.7     2.4.4 
3.0.6     2.4.4 
3.0.5     2.4.4 
3.0.4     2.4.4 
3.0.3     2.4.4   https://github.com/grails/grails-core/blob/4be6d666773353bd4c9a8fcb0a608f184012338d/build.gradle
3.0.2     2.4.3 
3.0.1     2.4.3   https://github.com/grails/grails-core/blob/2762f11b7ce6defdfafa010ca5e19be8c2a91f0a/build.gradle
3.0.0     2.4 	  https://grails.github.io/grails-doc/3.0.x/guide/introduction.html

2.5.6     2.4.10  https://github.com/grails/grails-core/blob/bd7cc10e17d34f20cedce979724f0e3bacd4cdb4/build.gradle
2.5.5     2.4.5   https://github.com/grails/grails-core/commit/0ec157df1ec607ef7da58a751979f28d9a090cf4
2.5.4     2.4.4   
2.5.3     2.4.4
2.5.2     2.4.4
2.5.1     2.4.4   http://mvnrepository.com/artifact/org.grails/grails-core/2.5.1
2.5.0     2.4.3   http://mvnrepository.com/artifact/org.grails/grails-core/2.5.0

2.4.5     2.3.11  http://mvnrepository.com/artifact/org.grails/grails-core/2.4.5
2.4.4     2.3.7   http://mvnrepository.com/artifact/org.grails/grails-core/2.4.4
2.4.3     2.3.6   http://mvnrepository.com/artifact/org.grails/grails-core/2.4.3
2.4.2     2.3.3
2.4.1     2.3.3	  https://jira.grails.org/browse/GRAILS-11476
2.4.0     2.3.0*  https://grails.github.io/grails-doc/2.4.x/guide/introduction.html#whatsNew24  
*First version officially compatible with Java 8.

2.3.11    2.1.9   https://objectpartners.com/2015/05/14/list-of-groovy-versions-for-each-version-of-grails/#comment-9329
2.3.10    2.1.9
2.3.9     2.1.9
2.3.8     2.1.9
2.3.7     2.1.9
2.3.6     2.1.9
2.3.5     2.1.9
2.3.4     2.1.9
2.3.3     2.1.9
2.3.2     2.1.9	  http://mvnrepository.com/artifact/org.grails/grails-core/2.3.5
2.3.1     2.1.8   http://mvnrepository.com/artifact/org.grails/grails-core/2.3.1
2.3.0     2.1.6   https://stackoverflow.com/questions/21799742/groovy-2-1-directorysize-method-not-found See also: http://www.groovy-lang.org/releasenotes/groovy-2.3.html

2.2.5     2.0.8
2.2.4     2.0.8	
2.2.3     2.0.8
2.2.2     2.0.8   http://mvnrepository.com/artifact/org.grails/grails-core/2.2.2
2.2.1     2.0.7   http://mvnrepository.com/artifact/org.grails/grails-core/2.2.1
2.2.0     2.0.5   https://jira.grails.org/browse/GRAILS-9474

2.1.5     1.8.8
2.1.4     1.8.8
2.1.3     1.8.8
2.1.2     1.8.8
2.1.1     1.8.8   https://jira.grails.org/browse/GRAILS-9394
2.1.0     1.8.6

2.0.4     1.8.6   
2.0.3     1.8.6
2.0.2     1.8.6
2.0.1     1.8.6   https://jira.grails.org/browse/GRAILS-8696
2.0.0     1.8.0   https://grails.github.io/grails-doc/2.0.x/guide/introduction.html

1.3.9     1.7.8
1.3.8     1.7.8
1.3.7     1.7.8   This and all below from: http://gregopet.blogspot.com/2010/12/which-groovy-version-does-my-grails.html
1.3.6     1.7.5
1.3.5     1.7.5	
1.3.4     1.7.4	
1.3.3     1.7.3
1.3.2     1.7.3	
1.3.1     1.7.0
1.3.0     1.7.0	

1.2.5     1.6.8
1.2.4     1.6.8
1.2.3     1.6.8
1.2.2     1.6.8	
1.2.1     1.6.5
1.2.0     1.6.5	

I would think this is where the groovy version is specified

https://github.com/grails/grails-core/blob/v4.0.8/gradle.properties

Hi Igor,
I think the version for 4.1.0 needs to be fixed, https://github.com/grails/grails-core/blob/v4.1.0/gradle.properties says for the Groovy Version 2.5.14, the build.gradle file points to the project map these days:
groovyVersion = System.getenv('CI_GROOVY_VERSION') ?: project.groovyVersion

Thanks @Frankst2 --fixed.