Writing Number As Text To A Cell

Process is that I read in lines from a text file and then based on a filter I then write some those values to a sheet. One of the values I transfer is always 5 characters with a trailing space. The first four may be all numbers (e.g. "0013 ") or a mix (e.g. "013G "). When I write these to the spreadsheet the ones without letters always end up as a number (e.g. "0013 " become 13). How do I force the cell to show all values as text in the cell just like I read it in. In fact, I'd prefer stripping out the trailing space but it's not critical. That I can do (TRIM).