Was your family a member of McPherson's Foursquare Gospel Church? The Foursquare website has a research link that states that they will be happy to assist researchers wanting to know more about the history of the Foursquare Church and Aimee Semple McPherson. "Feel free to contact us if you would like assistance in researching any aspect of Foursquare's history."
One of the features I especially like about their website is that they have a listing of all of their credentialed ministers who have died and which region they were working in. Gone to Be With the Lord would be even better if it provided information on ministers throughout the history of Foursquare. (It appears that it just lists the most recent deaths.) An archival feature would be a nice resource for those researching the church and their family history.
You can email for information about research at their Los Angeles headquarters at email@example.com .
**Image from Wikipedia