There are several different ways to search for questions in the GSS. One possibility is to go to the main codebook which includes the wordings of all GSS questions in the cumulative file. A second possibility is to go the questionnaire files and conduct a standard text search using regular search utilities. Be aware that such searches would only cover the particular version and year of the GSS that you were accessing. Also, note that while recent GSS questionnaires generally included GSS mnemonics, this is not the case for most questionnaires.
The GSS Data Explorer search function covers both mnemonics and question text for each variable in the cross-section data. Basic analysis of variables can also be conducted.
The Subject Index in the GSS Codebook is a useful resource to find various information about the GSS. When looking for specific question, be aware that between 2006 and 2014, not every question asked is documented in the cross-section data. Each year included several questions that were only asked of panel respondents.