A group acceptance sampling plan is considered for a truncated life test when a multiple number of items as a group can be tested simultaneously in a tester. Group acceptance sampling plans under the truncated life test are designed for lifetime percentiles when the lifetime of a product follows the generalized log-logistic distribution or the Burr type XII distribution. The design parameters such as the number of groups and the acceptance number required are determined by satisfying the consumer__ampersandsignlsquo;s risk and producer__ampersandsignlsquo;s risk at the specified quality levels, while the number of testers and the termination time are specified. The comparison between the distributions is given using the percentiles life of the products. The results are discussed with real life industrial examples. The extensive tables and graphs are given to explain the procedure developed under the generalized log-logistic distribution or the Burr type XII distribution.