Edit files in opened Vim session/new Vim tab

gistfile1.ini

$ cat .local/share/applications/gvim-tab.desktop 
[Desktop Entry]
Encoding=UTF-8
Name=GVim (Open in new tab)
  Comment=Edit in a new tab
  Exec=gvim --remote-tab-silent %F
  Terminal=false
  Type=Application
  Icon=/usr/share/pixmaps/vim.svg
  Categories=Application;Utility;TextEditor;
  StartupNotify=true
  MimeType=text/plain;
  NoDisplay=true
  StartupNotify=false

$ cat .local/share/applications/gvim-existing.desktop 
[Desktop Entry]
Encoding=UTF-8
Name=GVim (Open in existing)
  Comment=Edit in opened Vim buffer
  Exec=gvim --remote-silent %F
  Terminal=false
  Type=Application
  Icon=/usr/share/pixmaps/vim.svg
  Categories=Application;Utility;TextEditor;
  StartupNotify=true
  MimeType=text/plain;
  NoDisplay=true
  StartupNotify=false