[Provision]

/script d(GetGroupMemberSelectedRole("group1"))

2 = tank
4 = heal
1 = dps

or : LFG_ROLE_DPS, LFG_ROLE_HEAL, LFG_ROLE_TANK

function GetGroupMemberRolesFix(unitTag)
    local id = GetGroupMemberSelectedRole(unitTag)
    return (id == LFG_ROLE_DPS), (id == LFG_ROLE_HEAL), (id == LFG_ROLE_TANK)
end
#local isDps, isHealer, isTank = GetGroupMemberRoles(unitTag)
local isDps, isHealer, isTank = GetGroupMemberRolesFix(unitTag)