Et bien
prviate _mdp = ctrlText 0000; //Ton num
if ! (isNil {group player getVariable "gang_name"}) exitWith {hint "Tu a déja un gang"};
if ! (isNil {group player getVariable "Gang_tmp"}) exitWith {hint "Tu a déja un gang Tempo"};
[player] join (createGroup civilian);
private _grp = group...