Middle name on DCert is Claire, father listed as Leo Becker, mother as Bella Becker, both born in Germany.
1900 USA Census Township 5, Choctaw Nation, Indian Territory gives year; incorrect birth year but month and day of birth in death certificate from ancestry.com Texas, Death Certificates, 1903–1982
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLW3-XRZ : accessed 11 October 2017), Gertrude Becker in household of Leo Becker, McAlester Ward 2, Pittsburg, Oklahoma, United States; citing enumeration district (ED) ED 235, sheet 9A, family 173, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1270; FHL microfilm 1,375,283.
"Texas Deaths, 1890-1976," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K334-6YT : 5 December 2014), Gertrude Claire Zingery, 08 Aug 1931; citing certificate number 36974, State Registrar Office, Austin; FHL microfilm 2,135,604.
Find A Grave: Gertrude Clara Becker Zingery, Memorial 40636929 (includes family photo); 
(probable) names, date of parents marriage in NYC, "New York Marriages, 1686-1980," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F6H4-GQ2 : 12 December 2014), Leo Becker and Isabella Sprinz, 25 Feb 1884; citing reference ; FHL microfilm 1,570,327.