GASB stands for the Governmental Accounting Standards Board. They develop the accounting rules for public sector plans and employers.
GASB 67 and 68 are accounting standards that fundamentally change how pension costs are reported on financial statements. GASB 67 applies to pension plans while GASB 68 applies to employers.
For more information about GASB 67/68, take a look at our F.A.Qs.