[BDeep]

Try this,

// The prefix of a hostage map.
// -
// Default: "cs_"
sm_autogungame_csMapPrefix "XX_"

Then as long as you dont have a map that has "XX_" in it you should be ok.

It will run GG on cs_ maps (and and thing else that doesnt have cs_) and turn it off on de_

If this doesnt work let me know I will make on/off cvars for the de_ and the cs_ cvars.

So here is what your config should be:

// The prefix of a hostage map.
// -
// Default: "cs_"
sm_autogungame_csMapPrefix "XX_"

// A CFG File to run for NON Gungame Maps. Example EXEC CSS.CFG
// -
// Default: ""
sm_autogungame_ggcfg "exec css.cfg"

// The prefix of a defuse map.
// -
// Default: "de_"
//sm_autogungame_deMapPrefix "de_"

// A CFG File to run for Gungame Maps. Example EXEC GG.CFG
// -
// Default: ""
sm_autogungame_csscfg "exec gg.cfg"