Gertrude (--?--) was born circa 1832 in Germany.¹ Gertrude and John immigrated before 1850 to the United States of America. I don't think that they were married when they immigrated.¹ Gertrude married John H. Macke in 1850.²
          John, age 32, and Gertrude, age 18, were enumerated on the 1850 Federal Census in Cincinnati, Hamilton County, Ohio.¹ Follow the link to see the census image.

Citations

1. [S1784] John H. Macke household, 1850 U.S. Census, Cincinnati (ward 11), Hamilton County, Ohio, population schedule, page 373 (187), dwelling #285, family #506; National Archives micropublication M432, roll 691, viewed on Ancestry.com 1 Aug 2005 (image 62 of 462). PDN: Macke-OH-0077.
2. [S1784] John H. Macke, 1850 U.S. Census, Hamilton County, Ohio. PDN: Macke-OH-0077. Gives that they were married within the year.