To me it seems like you did not use pure GBL, but rather a mixture of that and 1,4-BD, therefore it did not all react with the calcium hydroxide...
You must dilute it a little with methanol so that you can filter it through Celite (diatomaceous earth, UTFSE), and then use the acetone dilution method found in my FAQ (also read the original patent, Patent US4393236 (http://l2.espacenet.com/dips/viewer?PN=US4393236&CY=gb&LG=en&DB=EPD)
) to isolate the salt.
Next time, be better prepared.