(adsbygoogle = window.adsbygoogle || []).push({}); ok once you have logged in to rcon type

/rcon devmap mp_strike "or whatever map you want" this will enable the use of cheats by everyone ex. /god /ufo /noclip ect.

to bind a key to turn gravity on and off type in console

/bind "0" rcon g_gravity 15 set the gravity to what you want and the lower the # the less gravity there is to turn gravity back on type this in console

/bind "9" rcon g_gravity 800 (default)