Some of the writers have the view that Gurmukhi Script was founded by Guru Angad Dev Ji. The main reason to this fact is seen from the translatory books of Baba Mohan Ji where in the page number 215 and 223 it is written that the Gurmukhi script has been invented by Guru Angad Dev Ji. Some scholars say the Characters of Gurmukhi Script were used by Bhai Lehna Ji during the time of Guru Nanak and he even showed this to Nanak. But these facts are not upto the mark. All the Thirty Five characters of Gurmukhi Script are present in the the Baani of Guru Nanak Dev known as "Raag Asa Di Patti". It is also been said that Gurmukhi Script was introduced by Guru Nanak itself but the latest discoveries reveal that this script was there much before Nanak.
There is no doubt to the fact that all the brahmnical holy scriptures of the ancient period have sanskrit as their main language, but since sanskrit was not the language of the common people it was not generally understood by the masses and the priest during those days used to translate them in their own ways and thus tend to make people confused. Guru Nanak narrated his baani in the language spoken by the common masses so that everybody understands it in an easy way. The best script to write Gurbani was Gurmukhi. Guru Angad Dev Ji gave Gurmukhi its present shape and form so that it could be pronounced and read in clear way. In this way Gurmukhi script became the language of the common man. Other Guru Sahibaan's and Bhagats used this script for their writings.
Guru Angad Dev ji not only improved the Gurmukhi script but made efforts to popularise this language. He made schools for the education of the children where Gurmukhi was being taught. An english scholar Dr Latinar wrote in his book named "History of Indigenous Education in Punjab" that Guru Angad Dev himself wrote primers for the small children and distributed them. He says that the first primer of Gurmukhi was written by Guru Angad Dev Ji. As this script became popular an enthusiasm was created among the people to read and write the language which they were so far only able to speak. Who so ever used to have a good hand writing was given the charge of writing the Gutkaas. Later on a tradition followed that who so ever want to learn and write Gurmukhi would write Gutkaas and distribute them. Principle Satbir Singh in his book "Sada Ithaas" wrote that it was during those days the trend of the distribution of Gutkaas started. Later on this became an important point in the Rehatnama that every Sikh should write and distribute at least one Gutka in his or her life time.