Hi John,
This is the only source information on Michael Mahoney's profile:
Michael Mahoney appears in [2] with wife Ellin and children Patrick, John, Mary, Margaret, Catherine, illegible, and Lucretia.
1. Profile created by John Sibert through the import of SibertWT.ged on Jan 5, 2019. This comment and citation should be deleted after a short biography has been added and primary sources have been cited.
2. 1850 United States Census for Springhill, Bradford County, Pennsylvania.
The Gedcom is not a source. the 1850 Census while it is a source, there is no information about the family, who they were, their names, their ages, where they lived other than Bradford, Pennsylvania.
With no information about Michael's birth place, birth date, marriage date, parent's names, wife's maiden name and other information about the family. You need to do more research about the family before you can add sources.
Do you have any more information about Michael, his wife or his children?
Have you tried using RootsSearch to find sources, on the bottom right of his profile-that is Michael's profile you will see:
Research
RootsSearch for Michael Mahoney: conveniently search 20+ genealogy websites. [more info]
Family Search is included in the options for finding sources, there could be valuable information on Family Search about Michael and his family.
If you do not currently have a Family Search membership, you should create an account, it is free but you do need to have an account to use the website.
The information as shown on Michael's profile is not enough to be sure that any records you may find are for this particular Mahoney family.
If you have any other information about the family you should add it to Michael's profile even if at present it is unsourced.
You can add it to his biography without creating profiles for other family members.
Do you have information about any other children of Michael and Mary Ellen?
If you need more help please come back here and ask as many questions as are needed.