It can be compared to didactic instruction, where the teacher sets out rules for students and then asks them to practice.
Example
The learners are shown a problem page containing various examples of the second conditional 'If I were you,…..'. They identify the structure and then the rules for making it.
In the classroom
Guided discovery is regarded by many teachers as an important tool. It encourages independence, makes learning more memorable, and if analysis is done in groups is a meaningful communicative task. It is important, however, to understand that some learners are resistant to this approach.
Further links:
https://www.teachingenglish.org.uk/article/presenting-new-language
https://www.teachingenglish.org.uk/article/planning-a-grammar-lesson
https://www.teachingenglish.org.uk/article/voiced-unvoiced-consonants