It's defensible to have a voluntary separation program with clear terms. Microsoft, for example, announced on April 23 that a voluntary separation program would launch on May 7. On that day they announced the precise terms of separation, with affected employees given until June 8 to participate. Perfectly reasonable.

What Gitlab is announcing here is that employees need to apply for a separation, at a yet-to-be-determined time under still-unknown terms, without a guarantee of acceptance, in the next 7 calendar days. Much different and just so much worse.