Can i use gujcet 2018 score and 2018 board result for acpc councelling?

Well tanmay gujcet score is valid for the current year only in which you are seeking admission into for example if you are appearing for gujcet in 2019 score of 2019 only will be considered as valid , score of previous year that is 2018 wont be valid also board result of previous is valid for example your board results came in 2018 so they will be valid for next year that is 2019 for acpc counselling as well

in short guject score of previous year is not valid for next year valid for current year only i.e in 2019 gujcet score of 2019 is valid only but  " BOARD SCORE OF PREVIOUS YEAR IS VALID i.e BOARD SCORE OF 2018 VALID IN ACPC 2019 COUNSELLING AND ABOVE"

Hope it helps