More details would help people answer your question, To get you started in refining the question:
1. Do you have any dates (birth, death, immigration, marriage) to help identify a specific George or Gladys McKee.
2. Any guesses about where in Canada Gladys came from and where did she end up moving to?
3. Is Mckee the married name or the birth name of Gladys.
4. What is the relationship of George and Gladys: husband and wife, brother and sister, father and daughter, mother and son, or something else?
5. Are there any common misspellings you have already encountered (such as Mickey, McKeyMcKay)