He erected a sawmill at Valley of the Moon to cut wood for crating his "Orange Blossom" brand of citrus fruit.

Gregory was also instrumental in creating the Crest Forest County Water District (CFCWD), which, in turn, was necessary to acquire federal aid in order to develop the area.

In 2014, the San Bernardino County partnered with The California Parks Company, now named Basecamp Hospitality, after six years of decline due to the flagging economy.

In 2018, San Bernardino County put the concessionaire contract up for bid to find a new managing company for Lake Gregory.

Basecamp Hospitality won the bid as the only concessionaire applying, but struggled to come to financial terms with the longterm contract and renewed a two-year agreement instead.

The California Office of Environmental Health Hazard Assessment (OEHHA) has developed a safe eating advisory for Lake Gregory based on levels of mercury found in fish caught from this water body.