Pontiac firebird orverheating?

is there any way of knowing like are there any signs that i should lokk for if i blew a head gasket or head. and the only time it overheats is like over a 30minute time period is it still ok to like drive it. right now we are not able to put it in the garage cause i need to save up the money for it but would it be ok to like every now an dthen drive it around the neiborhood to keep it running casuse right no it is just sitting in the driveway