What type of estate does Gibson have if his parents gave him property with the condition he does not join a rock band?

In this scenario, Gibson's parents have given him property with a specific condition attached—that he must not join a rock band. This type of estate is known as a fee simple subject to a condition subsequent. It allows for the possibility that the owner can maintain rights to the property as long as they adhere to the specified conditions. If the condition is violated—in this case, if Gibson does join a rock band—his parents have the right to reclaim the property.

The key aspect of a fee simple subject to a condition subsequent is that it does not automatically end upon the violation of the condition; rather, the original grantors (Gibson's parents) must take action to enforce the condition and reclaim the property. This distinguishes it from a fee simple determinable, where ownership automatically reverts to the grantor when the specified condition is violated. Hence, the nature of the condition placed on Gibson and the rights of the grantors fundamentally aligns with the characteristics of a fee simple subject to a condition subsequent.