[HazardouS]

pawn Код:

if(sscanf(params, "%s[128]", text)) return SCM(playerid, -1, "Usage: /g <text>");

You placed an additional '%'. This is how you do it right:

pawn Код:

if(sscanf(params, "s[128]", text)) return SCM(playerid, -1, "Usage: /g <text>");